On Sep 26, 2007 17:50 +0200, Erich Focht wrote: > ---------- Forwarded Message ---------- > > Subject: [Lustre-devel] max_sectors_kb change doesn't help > Date: Wednesday 26 September 2007 17:41 > From: Erich Focht <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > > Hi, > > in /proc/fs/lustre/obdfilter/*/brw_stats I found that the disk I/O is done > in 512K pieces. Following the Lustre manual I changed > /sys/block/DEVICE/queue/max_sectors_kb to 1024 but the I/O sizes in Lustre > didn't change. > > Is there any place in Lustre where I can enforce 1MB I/Os? What else can I do? > My RAID is connected through an mpt fusion driver and I cannot find any place > where the I/O size is limited to 512KB. In fact, without Lustre I am able to > write with larger I/Os, so I suspect it's not the driver's fault...
Did you try remounting the OSTs after changing the setting? Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc. _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
